106 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Dec. 20, 



Ion mater larium, of which there are many drifted trunks in the sand- 

 -stones in a blackened and calcified condition, Calamites JSueJcovii, 

 C Cistii, Calamodendron approximatum, Lepidodendron undulatum, 

 Lepidophloios parvus, and Stigmaria ficoides. As in the Upper Coal- 

 formation of Pictou, trunks of Conifers and Calamites are the most 

 abundant fossils. 



b. Division 2. — This occurs at Eagged Eeef and its vicinity. Its 

 thickness is 650 feet. It constitutes the lower part of the Upper 

 Coal-formation. 



The rocks are white and grey sandstones with occasional reddish 

 beds, and red and grey shales. The sandstones and shales are nearly 

 in equal proportions. Underclays, or soils supporting erect plants, 

 probably Sigillarice, occur at two levels. 



Fossils are not numerous. Those collected were Sigillaria scu- 

 tellata and Stigmaria Jicoides, Calamites SucJcovii, Sphenopteris 

 hymenophylloides, AletJiopteris Jonchitica, Cydopteris Jieterophylla (?), 

 Beinertia Goepperti, and portions of the strobiles of two species of 

 Lepidophloios, namely Lepidopliyllum lanceolatum and L. trinerve. 



c. Division 3. — This extends in descending order from the vicinity 

 of Eagged Eeef to M*=Cairn's Brook. Its thickness is 2134 feet. It 

 includes the upper part of the '^Middle Coal -formation," and is 

 perhaps equivalent, in part at least, to the Upper Coal-measures of 

 Great Britain, and to the Upper Coal-formation of American authors. 



It includes 1009 feet of sandstone, almost all of which is grey, 

 and 912 feet of grey and reddish shale and clay. It contains 22 

 beds of coal, all of small thickness, and most of them of coarse 

 quality. Below I give each bed of coal in detail, with its roof and 

 floor and its fossils ; and the intervening mechanical beds in brac- 

 kets. The thickness of the roofs and floors is included in that stated 

 for the intervening beds. 



ft. in. 

 (Carbonaceous shale, grey understone, with Stigmaria 



and grey shale) 7 



{G-rey argillaceous shale. 

 Coal 1 inch ,.... 1 

 Grey argillaceous underclay, Stigmaria. 



The roof holds abundance of AletJiopteris Jonchitica, The 

 coal is coarse and earthy, with much epidermal and bast 

 tissue*, vascular bundles of ferns, and impressions of /Sigil- 

 laria and Cordaites. It is a compressed vegetable soil or 

 dirt-bed, resting on an argillaceous subsoil with rootlets of 

 /Stigmaria. 



(Grey and reddish sandstones and grey and red shales 



with ironstone nodules) 281 6 



^Reddish argillaceous shale. 



I Coal 1 inch 1 



Coal-group 2 ...-( Carbonaceous shale 4 inches... I 6 



Coal 1 inch J 



1^ Reddish underclay, Stigmaria. 



* For explanation as to the nature of these and other structures in the coal, 

 see under § IV., below. 



